Used Ports

These ports are used for connection to Microsoft Exchange Online using EWS (Exchange Web Services).

If you plan to use Exchange Online as a mail server for sending notifications, open port 587.

Backup proxy server

TCP

9193

This port should be open on the backup proxy server for data communication with the Veeam Backup for Office 365 server.

Clients

Veeam Backup for Microsoft Office 365 management server

TCP

9191

This port should be open on Veeam Backup for Office 365 management server for data communication between server and clients: RESTful API, PowerShell and Veeam.Archiver.Shell (UI), and, optionally, connection to remote management server (if any).

Veeam Explorer for Microsoft Exchange

Veeam Backup for Microsoft Office 365 management server

TCP

9194

This port should be open on Veeam Backup for Office 365 management server for data communication between solution components, as well as for Veeam Explorer for Microsoft Exchange clients (RESTful API and PowerShell).

Backup proxy server

Veeam Backup for Microsoft Office 365 management server

TCP

9191

This port should be open on the Veeam Backup for Office 365 management server for data communication with backup proxy.

Microsoft Exchange Online

TCP

80, 443

These ports are used for connection to Microsoft Exchange Online using EWS (Exchange Web Services).